package com.qd.panda.service.collect;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.panda.domain.entity.collect.UserCollectDTO;
import com.qd.panda.mapper.collect.UserCollectMapper;
import com.qd.panda.model.UserCollect;
import com.qd.panda.service.park.CarParkService;
import com.qd.system.service.user.BaseUserInfoService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

import static java.util.stream.Collectors.toList;

/**
 * 用户收藏
 *
 * @author sjk
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class UserCollectService extends BaseService<UserCollectMapper, UserCollect> {

    private static final String PREFIX_ID = "panda_user_collect_cid_{0}";
    private static final String PREFIX_UNIQUE_PANDA_USER = "panda_user_collect_userId_{0}_parkId_{1}";

    private final RedisTemplateUtil<UserCollect> redisTemplateUtil;

    private final CarParkService carParkService;

    private final BaseUserInfoService baseUserInfoService;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public UserCollectDTO save(UserCollectDTO dto) {
        checkUnique(dto);
        checkMb(dto);
        final UserCollect model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 删除，单个
     *
     * @param cid 主键
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeById(String cid) {
        final UserCollect model = Optional.ofNullable(getById(cid)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        try {
            if (!super.removeById(cid)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(UserCollectDTO dto) {
        final QueryWrapper<UserCollect> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param cid 主键
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String cid) {
        boolean exists = false;
        if (StringUtils.hasLength(cid)) {
            final UserCollect model = getById(cid);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param cid 主键
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public UserCollect getById(String cid) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, cid);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(cid), UserCollect.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param cid 主键
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public UserCollectDTO getByIdDto(String cid) {
        return Optional.ofNullable(getById(cid)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public UserCollect getOne(UserCollectDTO dto) {
        final QueryWrapper<UserCollect> queryWrapper = createQueryWrapper(dto);
        UserCollect model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public UserCollectDTO getOneDto(UserCollectDTO dto) {
        return Optional.ofNullable(getOne(dto)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    @Transactional(readOnly = true)
    public List<UserCollect> getList(UserCollectDTO dto) {
        final QueryWrapper<UserCollect> queryWrapper = createQueryWrapper(dto);
        final List<UserCollect> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<UserCollectDTO> getListDto(UserCollectDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */
    @Transactional(readOnly = true)
    public IPage<UserCollectDTO> page(Page<UserCollect> page, UserCollectDTO dto) {
        final QueryWrapper<UserCollect> queryWrapper = createQueryWrapper(dto, "uc.");
        final IPage<UserCollectDTO> iPage = baseMapper.page(page, queryWrapper);
        Optional.ofNullable(iPage.getRecords()).ifPresent(l -> l.forEach(this::buildDisplay));
        queryWrapper.clear();
        return iPage;
    }

    /**
     * 根据唯一性索引获得数据
     * <p>
     * param userId
     * param parkId
     *
     * @return 单条数据
     */
    @Transactional(readOnly = true)
    public UserCollect getUniqueByUserIdAndParkId(String userId, String parkId) {
        final QueryWrapper<UserCollect> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("user_id", userId);
        queryWrapper.eq("park_id", parkId);
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_UNIQUE_PANDA_USER, userId, parkId);
        final UserCollect model = redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getOne(queryWrapper, false), UserCollect.class);
        queryWrapper.clear();
        return model;
    }

    /**
     * 验证唯一性索引
     *
     * @param dto 页面对象
     */
    private void checkUnique(UserCollectDTO dto) {
        UserCollect model = getUniqueByUserIdAndParkId(dto.getUserId(), dto.getParkId());
        if (null != model) {
            checkUnique(dto, model);
        }
    }

    /**
     * 验证唯一性索引
     *
     * @param dto   页面对象
     * @param model 根据约束字段查询出来的数据库对象
     */
    private void checkUnique(UserCollectDTO dto, UserCollect model) {
        if (!StringUtils.hasLength(dto.getCid())) {
            throw new ApiException("数据已存在，请勿重复添加");
        }
        if (!dto.getCid().equals(model.getCid())) {
            throw new ApiException("数据已存在，请勿重复添加");
        }
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(UserCollect model) {
        if (null == model) {
            return;
        }
        String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getCid());
        redisTemplateUtil.deleteByKey(key);
        key = RedisTemplateUtil.getRedisCacheKey(PREFIX_UNIQUE_PANDA_USER, model.getUserId(), model.getParkId());
        redisTemplateUtil.deleteByKey(key);
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public UserCollectDTO modelToDto(UserCollect model) {
        if (null == model) {
            return null;
        }
        final UserCollectDTO dto = new UserCollectDTO();
        dto.setCid(model.getCid());
        dto.setAddTime(model.getAddTime());
        dto.setUserId(model.getUserId());
        dto.setParkId(model.getParkId());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public UserCollect dtoToModel(UserCollectDTO dto) {
        if (null == dto) {
            return null;
        }
        final UserCollect model = new UserCollect();
        model.setCid(dto.getCid());
        model.setAddTime(dto.getAddTime());
        model.setUserId(dto.getUserId());
        model.setParkId(dto.getParkId());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(UserCollectDTO dto) {
        Optional.ofNullable(carParkService.getCarParkInfoByRedis(dto.getParkId())).ifPresent(dto::setCarParkInfo);
    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<UserCollectDTO> modelToDtoList(List<UserCollect> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<UserCollect> dtoToModelList(List<UserCollectDTO> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<UserCollect> createQueryWrapper(UserCollectDTO dto) {
        return createQueryWrapper(dto, "");
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto        查询参数，不为空的属性会被自动加入
     * @param tableAlias 表别名
     */
    public QueryWrapper<UserCollect> createQueryWrapper(UserCollectDTO dto, String tableAlias) {
        final QueryWrapper<UserCollect> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(tableAlias)) {
                if (tableAlias.charAt(tableAlias.length() - 1) != '.') {
                    tableAlias += ".";
                }
            }
            if (StringUtils.hasLength(dto.getUserId())) {
                queryWrapper.eq(tableAlias + "user_id", dto.getUserId());
            }
        }
        queryWrapper.orderByDesc(tableAlias + "add_time");
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     */
    public List<UserCollect> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<UserCollect> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(UserCollect::getCid).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    /**
     * 验证码表字段是否正确
     *
     * @param dto 前端对象
     */
    private void checkMb(UserCollectDTO dto) {
        if (Boolean.FALSE.equals(carParkService.isExistsById(dto.getParkId()))) {
            throw new ApiException("停车场ID不存在:[" + dto.getParkId() + "]");
        }
        if (Boolean.FALSE.equals(baseUserInfoService.isExistsById(dto.getUserId()))) {
            throw new ApiException("用户ID不存在:[" + dto.getUserId() + "]");
        }
    }

}